...A2 Biology Unit 5 page 1 AQA A2 Biology Unit 5 Contents Specification Human Nervous system Nerve Cells The Nerve Impulse Synapses Receptors Muscle Animal Responses Control of Heart Rate The Hormone System Homeostasis Temperature Homeostasis Blood Glucose Homeostasis Control of Mammalian Oestrus Plant Responses The Genetic Code Protein Synthesis Gene Mutations Stem Cells Control of Gene Expression Biotechnology DNA sequencing Southern Blot In vivo cloning Genetically Modified Organisms Gene Therapy Genetic Screening and Counselling 2 4 6 0 14 17 24 28 30 33 34 38 42 44 48 50 54 57 63 66 71 76 80 85 89 92 Molecular Genetics These notes may be used freely by A level biology students and teachers, and they may be copied and edited. Please do not use these materials for commercial purposes. I would be interested to hear of any comments and corrections. Neil C Millar (nmillar@ntlworld.co.uk) Head of Biology, Heckmondwike Grammar School High Street, Heckmondwike, WF16 0AH Jan 2010 HGS Biology A-level notes NCM 8/09 A2 Biology Unit 5 page 2 Biology Unit 5 Specification Control Systems Organisms increase their chance of survival by responding to changes in their environment. The Nerve Impulse The structure of a myelinated motor neurone. The establishment of a resting potential in terms of differential membrane permeability, electrochemical gradients and the movement of sodium and potassium ions. Changes in membrane permeability lead to depolarisation and the...
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...Class: Biology CP Teacher: Mr. Liska Date: 1-22-13 Standards: B-4.1 Compare DNA and RNA in terms of structure, nucleotides, and base pairs. B-4.3 Explain how DNA functions as the code of life and the blueprint for proteins. B-4.4 Summarize the basic processes involved in protein synthesis (including transcription and translation). Essential Questions: What is genetic material composed of? What is the shape of the DNA molecule? How is information organized in a DNA molecule? What scientific investigations led to the discovery of DNA’s structure? How does DNA replicate, or make a copy of itself? What are the roles of protein in DNA replication? What is the process of gene expression? What is the role of RNA in gene expression? What happens during transcription? What are the major steps of translation? Learning Objectives: * Students will be able to synthesize the importance of DNA to life on earth. * After going through notes and activities on DNA properties, students will be able to analyze the 1components in the basic chemical structure and properties of DNA. * Students will be able to see visual components that DNA is contained in the order of bases, while the base-pairing structure allows information to be copied. * Given the structure of DNA, students will be able to investigate how the process of DNA replication occurs. * Students will evaluate how gene expression produces proteins by transcription and translation. * Given models...
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...STAGE 2 BIOLOGY ASSESSMENT TYPE 1: Investigations Folio Issues Investigation Human Awareness Essay – Source Analysis Should all babies be DNA fingerprinted at birth? Article to be evaluated: Website: Genetics and Public Issues – ELSI (Ethical, Legal and Social Issues) – http://darwin.nmsu.edu/ Reliability: This source is a reliable one as it was developed by Dr. Clay Dillingham and Dr. Susan Root. They are professionals, educated in the technique and knowledgeable about the subject with years of experience as scientists in the field. Therefore it is expected to have some reliability. Bias: This article presents both the advantages and disadvantages of the topic of storing everyone’s DNA sequences and is not biased in either direction. It gives the scientific facts and procedures of DNA fingerprinting and continues to give the good effects and also the issues it would cause in the public. It explains how DNA fingerprinting would benefit us, referring to the solving of criminal offenses, detection of possible future diseases of the subject, clues about possible behavioral traits, and other medical information. This is the positive side. The article also discusses the negative side and questions the accessibility of the DNA fingerprints and the information they hold. The effects on the public if the information was misused are discussed including the impact on individuals in relation to seeking insurance policies...
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...BIO 101 Principles of Biology Program Council The Academic Program Councils for each college oversee the design and development of all University of Phoenix curricula. Council members include full-time and practitioner faculty members who have extensive experience in this discipline. Teams of full-time and practitioner faculty content experts are assembled under the direction of these councils to create specific +courses within the academic program. Copyright Copyright 2009 by the University of Phoenix. All rights reserved. University of Phoenix® is a registered trademark of Apollo Group, Inc. in the United States and/or other countries. Microsoft®, Windows®, and Windows NT® are registered trademarks of Microsoft Corporation in the United States and/or other countries. All other company and product names are trademarks or registered trademarks or their respective companies. Use of these marks is not intended to imply endorsement, sponsorship, or affiliation. Edited in accordance with University of Phoenix® editorial standards and practices. Course Syllabus Course Title: | BIO 101 Principles of Biology | Course Schedule: | April 25, 2011 to May 23, 2011 | Course Location/ Times/Newsgroup: | Henderson CampusMonday, 6:00 pm to 10:00 pmHEFOUN78E | Required Text: | Simon, E. J., Reece, J. B., Dickey, J. L. (2010). Essential biology with physiology. (3rd ed.). San Francisco, CA: Pearson/Benjamin Cummings. Note: All required text materials can be found on the...
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...The Process of DNA Replication Western Governors University The Process Of DNA Replication The process of DNA replication at the biochemistry level starts with DNA to RNA and RNA to protein. DNA is “The Master” molecule of every cell. It contains vital information that is passed onto every generation. It has information on how to make itself as well as other molecules. DNA is the key to life. RNA leaves the nucleus of the cell and makes proteins. (Sally Seller December 2013) http:/ /www.cytochemistry.net/cell-biology/ ribosome.htm The process by which both strands are replicated starts with the strands being separated and unwound by DNA Helicase. DNA polymerases, an enzymes which catalyze the synthesis of new complementary strands will add nucleotides to the 3’ end of the growing nucleotide strand. An RNA primer is needed to start the synthesis of a new strand to make the first 3’ end the enzyme needs. After that, the RNA is taken out and replace with DNA. The synthesis of both complementary strands start in the 5’ to 3’ direction. The leading strand will then grow continuously in the direction of the replication fork. On the leading strand, RNA primase comes in and add RNA primer. ! ! (thinkwell biochemistry 6.4.2) Newly synthesized DNA The lagging strand will point away from the opening of the fork. RNA primase will constantly add RNA primer as the strand opens up On the leading strand, DNA polymerase III will work to add all the DNA nucleotide . On...
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... | | |College of Natural Sciences | | |SCI/230 Version 7 | | |Introduction to Life Science | Copyright © 2012, 2009, 2008, 2007, 2006, 2005 by University of Phoenix. All rights reserved. Course Description This course applies a broad, conceptual understanding of biology. Students are introduced to scientific ideologies and concepts that not only shape our biological world, but also shape us as humans. Students examine the scientific method, evolution and biodiversity, the biology of cells, energy systems, the dynamics of inheritance, and the effect humans have on the environment. The text emphasizes methods and the theoretical foundations of ideas, while minimizing isolated facts. It stresses the integration of ideas, making connections that form our understanding of the living world. Policies Faculty and students/learners will be held responsible for understanding and adhering to all policies contained within the following two documents: • University policies: You must be logged into the student website to view this document. • Instructor policies: This document is posted in the Course Materials...
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...AQA GCSE Biology – Unit 2 summary notes AQA GCSE Biology Summary Notes For Unit B2 Exam Tuesday th May 13 2014 Page 1 AQA GCSE Biology – Unit 2 summary notes B2.1 Cells and Cell Structures Summary All living things are made up of cells. The structures of different types of cells are related to their functions. To get into or out of cells, dissolved substances have to cross the cell membranes. Cells Cells are the smallest unit of life. All living things are made of cells. Most human cells, like most other animal cells, have the following parts: o nucleus o cytoplasm o cell membrane o mitochondria o ribosomes Plant and algal cells also have: o cell wall o chloroplasts o permanent vacuole What do these structures do? Nucleus – controls the activities of the cell. Cytoplasm – where most of the chemical reactions take place. Cell membrane - controls the passage of substances in and out of the cell. Mitochondria - where most energy is released in respiration. Page 2 AQA GCSE Biology – Unit 2 summary notes Ribosomes - where protein synthesis occurs. Cell wall – made of cellulose and strengthens plant cells. Chloroplasts - absorb light energy to make food in plant cells. Permanent vacuole - filled with cell sap in plant cells. Yeast Yeast is a single-celled organism. The cells have a nucleus, cytoplasm and a membrane surrounded by a cell wall. Bacteria Bacterium is a single-celled organism. A bacterial cell consists of cytoplasm and a membrane...
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...AS Biology Unit 1 page 1 AQA AS Biology Unit 1 Contents Specification Biological Molecules Chemical bonds Carbohydrates Lipids Proteins Biochemical Tests Enzymes Eukaryotic Cells Prokaryotic Cells Cell Fractionation Microscopy The Cell Membrane Movement across Cell Membranes Exchange The Gas Exchange System Lung Diseases The Heart Coronary Heart Disease The Digestive System Cholera Lifestyle and Disease Defence against Disease Immunisation Monoclonal Antibodies 1 – Mathematical Requirements 2– The Unit 1 Exam 2 4 6 8 10 16 17 24 28 30 31 35 37 44 46 50 54 58 60 67 68 72 80 81 83 86 Cells Human Physiology Disease Appendices These notes may be used freely by A level biology students and teachers, and they may be copied and edited. Please do not use these materials for commercial purposes. I would be interested to hear of any comments and corrections. Neil C Millar (nmillar@ntlworld.co.uk) Head of Biology, Heckmondwike Grammar School High Street, Heckmondwike, WF16 0AH July 2011 HGS Biology A-level notes NCM/7/11 AS Biology Unit 1 page 2 Biology Unit 1 Specification Biochemistry Biological Molecules Biological molecules such as carbohydrates and proteins are often polymers and are based on a small number of chemical elements. • Proteins have a variety of functions within all living organisms. The general structure of an amino acid. Condensation and the formation of peptide bonds linking together amino acids to form polypeptides. The relationship...
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... Science Genetics Notes & Theories science blog Next Previous Blog home What is life? The physicist who sparked a revolution in biology Erwin Schrödinger introduced some of the most important concepts in biology, including the idea of a 'code' of life Share 642 inShare9 Email Redeye tree frog Insights from biology and computing built upon Schrödinger's genius, changing our view of life forever. Photograph: Rick Sammon/AP Seventy years ago, on 5 February 1943, the Nobel prizewinning quantum physicist Erwin Schrödinger gave the first of three public lectures at Trinity College, Dublin. His topic was an unusual one for a physicist: "What is Life?" The following year the lectures were turned into a book of the same name. One of Schrödinger's key aims was to explain how living things apparently defy the second law of thermodynamics – according to which all order in the universe tends to break down. It was this that led my colleague Professor Brian Cox to use Schrödinger as the starting point of his BBC series Wonders of Life, leading to What is Life? shooting up the Amazon sales chart. But Schrödinger's book contains something far more important than his attempt to fuse physics and biology. In that lecture 70 years ago, he introduced some of the most important concepts in the history of biology, which continue to frame how we see life. At a time when it was thought that proteins, not DNA, were the hereditary material...
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...Biology From Wikipedia, the free encyclopedia For other uses, see Biology (disambiguation). Biology deals with the study of the many varieties of living organisms. Clockwise from top left: Salmonella typhimurium, Phascolarctos cinereus, Athyrium filix-femina, Amanita muscaria, Agalychnis callidryas, and Brachypelma smithi Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy.[1] Biology is a vast subject containing many subdivisions, topics, and disciplines. Among the most important topics are five unifying principles that can be said to be the fundamental axioms of modern biology:[2] 1. Cells are the basic unit of life 2. New species and inherited traits are the product of evolution 3. Genes are the basic unit of heredity 4. An organism regulates its internal environment to maintain a stable and constant condition 5. Living organisms consume and transform energy. Subdisciplines of biology are recognized on the basis of the scale at which organisms are studied and the methods used to study them: biochemistry examines the rudimentary chemistry of life; molecular biology studies the complex interactions of systems of biological molecules; cellular biology examines the basic building block of all life, the cell; physiology examines the physical and chemical functions of the tissues, organs, and organ systems of an organism; and ecology...
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...2. Read the Article: “Functions and Utility of Alu Jumping Genes”. As you read, answer the following questions (they go paragraph by paragraph and will help you understand the reading). Introductory paragraph: In your own words, define an Alu element? Alu elements are DNA sequences that are phenotypically usless bye genotypically significant. They can replicate with the help of various enzymes and incerts themselfs into new locations of the genome. What types of organisms have Alu elements? only primates Short Interspersed Elements (SINEs): The Alu Example Describe how a retrotransposon is replicated. It is transcribed into mRNA by RNA polymerase and then converted into a DNA molecule by reverse transcriptase. What does it mean to be...
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...Mohammad Ahmed Hotiana (17-10532) BIOT 313 (Molecular Biology) THE REPLICATION OF DNA IN ESCHERICHIA COLI By Mathew Meselson & Franklin W Stahl Biology Vol. 44, 1958 Introduction: Deoxyribonucleic acid (DNA) molecules are responsible for the transfer of hereditary information from one generation to another. DNA replication is the process by which DNA molecules replicate to produce identical copies that are to be transferred to the daughter cells. Because of its long history as a sample organism for many biological experiments and its ability to replicate at a fast rate under normal conditions, researches used Escherichia Coli bacteria for this experiment. Hypothesis: After replication of a DNA molecule, each daughter molecule contains one parental strand and one newly synthesized strained; therefore undergoing replication in accordance to the semiconservative mechanism. Technique: By introducing N15 isotope of nitrogen (that has a higher density as compared to that of the highly abundant N14 isotope), density-gradient centrifugation can be used to analyze the DNA samples of different generations. Therefore, conforming the mechanism of DNA replication. Experimentation: E.Coli B bacteria was grown in a medium containing ammonium chloride as the only source of nitrogen. Preparation of bacteria labelled with N15: Growing washed cells (to a titer of 2 x 108 /ml) in a medium containing 100 ug/ml of N15H4Cl (of 96.5 percent isotopic purity)...
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...This is an annotated list of biological websites, including only notable websites dealing with biology generally and those with a more specific focus. Actionbioscience -- sponsored by the American Institute of Biological Sciences (AIBS) -- providing articles by scientists, science educators, and science students on issues related to seven bioscience challenges: environment, biodiversity, genomics, biotechnology, evolution, new frontiers in science, and bioscience education Animal Diversity Web -- created by the staff at the Museum of Zoology at the University of Michigan -- collecting the natural history, classification, species characteristics, conservation biology, and distribution information of thousands of species of animals Animal Genome Size Database -- created by Dr. T. Ryan Gregory of the University of Guelph in Canada -- publishing genome size estimates for vertebrate and invertebrate animals Animal Science Image Gallery -- a work of the United States Federal Government -- containing images, animations, and video for classroom and outreach learning Bioinformatic Harvester -- a bioinformatic meta search engine at KIT Karlsruhe Institute of Technology -- working for human, mouse, rat, zebrafish, drosophila and arabidopsis thaliana information Catalogue of Life -- compiled with sectors provided by 52 taxonomic databases from around the world -- planned to become a comprehensive catalogue of all known species of organisms on Earth Earth...
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...DNA The Building Blocks Of Life Edward J Lechleitner 11/3/2015 We all know that elephants only give birth to little elephants, giraffes to giraffes, dogs to dogs and so on for every type of living creature. Why? The answer lies in a molecule known as deoxyribonucleic acid (DNA), which contains the biological instructions that make each species unique. DNA, along with the instructions it contains, is passed from adult organisms to their offspring during reproduction. In organisms called eukaryotes, which includes all living animals, DNA is found inside the area of the cell called the nucleus. Because the cell is very small, and because organisms have many DNA molecules per cell, each DNA molecule must be tightly packed. This packed form of the DNA is called a chromosome. During DNA replication, DNA unwinds so it can be copied. At other times in the cell cycle, DNA also unwinds so that its instructions can be used to make proteins and for other biological processes. But during cell division, DNA is in its compact chromosome form to enable transfer to new cells. Researchers refer to DNA found in the cell's nucleus as nuclear DNA. An organism's complete set of nuclear DNA is called its genome. Besides the DNA located in the nucleus, humans and other complex organisms also have a small amount of DNA in cell structures known as mitochondria. Mitochondria generate the energy the cell needs to function properly. DNA is made of chemical building blocks called...
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...1214 Biology I Cell Biology Introduction Practical 1 Practical 1 Cell Biology Biological Studies I molecules I Practical 2 Practical 2 Cell Biology Biological Studies II molecules II Practical 3 Cell Biology Studies III Practical 4 Cell Biology Studies IV Practical 8 Cell Biology Studies VIII Practical 5 Cell Biology Studies V Practical 6 Cell Biology Studies VI Practical 7 Cell Biology Studies VII Practical 9 Cell Biology Studies IX Practical 10 Cell Biology Studies X - Experiment Description Page Writing of Lab Reports Identification of Biomolecules 5 13 Identification of Unknown Carbohydrate Solutions and Investigation of Action of Saliva and HCl in Carbohydrate Solution at Two Different Temperatures Investigation of the Effects of Catalase Concentration on Hydrogen Peroxide Decomposition 20 Synthesis of Starch Using an Enzyme Extracted from Potato Tuber Investigation of the Effects of Different Catalytic Conditions on Hydrogen Peroxide Decomposition Microscopy 27 Practical 6 Cell studies II Practical 7 Cell studies III Extraction of Cell Organelles by Cell Fractionation Determination of Solute Potential of Potato Cell Sap 47 Practical 8 Cell studies IV Effects of Different Treatments on Stained Potato Cells 64 Practical 9 Energetics I Respiration of Germinating Beans 67 Microscopic Examination of Cells at Various Stages of Plant Mitosis and Meiosis DNA, Mitosis...
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